Probably too late now, but I find myself wishing Deep Impact had been launched into a resonant orbit around the sun with comet Tempel I. IIRC, comets period is ~5.5 years, and a 33 month orbit, or a 22 month orbit for Deep Impact, would eventually bring it back to the same comet! <div class="Discussion_UserSignature"> <p><font color="#ff0000"><strong>TPTB went to Dallas and all I got was Plucked !!</strong></font></p><p><font color="#339966"><strong>So many people, so few recipes !!</strong></font></p><p><font color="#0000ff"><strong>Let's clean up this stinkhole !!</strong></font> </p> </div>